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SC825 Chassis Manual
C-7 Front Jumper Locations and Pin Definitions
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
JP18
JP29:9072 RESET
JP29:9072 RESET
Explanation of Jumpers
To modify the operation of the backplane,
jumpers can be used to choose between
optional settings. Jumpers create shorts
between two pins to change the function
of the connector. Pin 1 is identified with
a square solder pad on the printed circuit
board. Note: On two pin jumpers, "Closed"
means the jumper is on and "Open" means
the jumper is off the pins.
Jumper
Open (Jumper off the pins): Default
JP29
Closed (Jumper on the pins): Reset
Open (Jumper off the pins): Default
JP18
Closed (Jumper on the pins): Reset
*The buzzer sound indicates that a condition requiring immediate attention has
occurred.
The buzzer alarm is triggered by the following conditions:
1.
Hard drive failure
2.
System temperature over 45º Celsius.
GND
GND
+5V
+5V
1
1
JP29
JP50
1
1
JP38
16
16
JP33
Figure C-3: Front Jumpers
Jumper Settings
Jumper Settings
JP36
1
1
REV 2.0
REV 2.0
48
48
JP37
32
32
JP34
JP41
JP40
MG9072 Chip Reset
Buzzer Reset*
C-6
JP43
I C
I C
2
2
#2
#2
ACT_IN
ACT_IN
SIDEBAND #2
SIDEBAND #2
SAS825TQ
SAS825TQ
BAR CODE
BAR CODE
2
2
I C
I C
#1
#1
SIDEBAND #1
SIDEBAND #1
JP42
3
2
Connector
Pins
Open, jumper off
the pins.
Jumper
Closed, jumper on
the pins.
3
2
Setting
Note
1
1
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